WO1998026429A1 - Thin aprotic electrolyte film, immobilized liquid film conductor, and polymer cell - Google Patents
Thin aprotic electrolyte film, immobilized liquid film conductor, and polymer cell Download PDFInfo
- Publication number
- WO1998026429A1 WO1998026429A1 PCT/JP1997/004561 JP9704561W WO9826429A1 WO 1998026429 A1 WO1998026429 A1 WO 1998026429A1 JP 9704561 W JP9704561 W JP 9704561W WO 9826429 A1 WO9826429 A1 WO 9826429A1
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- Prior art keywords
- membrane
- polyolefin
- microporous
- thin film
- weight
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- ZCYXXKJEDCHMGH-UHFFFAOYSA-N nonane Chemical compound CCCC[CH]CCCC ZCYXXKJEDCHMGH-UHFFFAOYSA-N 0.000 description 1
- 239000011255 nonaqueous electrolyte Substances 0.000 description 1
- BKIMMITUMNQMOS-UHFFFAOYSA-N normal nonane Natural products CCCCCCCCC BKIMMITUMNQMOS-UHFFFAOYSA-N 0.000 description 1
- UKGRTCZMPQERFQ-UHFFFAOYSA-N octadecyl 2-hydroxypropanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)C(C)O UKGRTCZMPQERFQ-UHFFFAOYSA-N 0.000 description 1
- HMZGPNHSPWNGEP-UHFFFAOYSA-N octadecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)C(C)=C HMZGPNHSPWNGEP-UHFFFAOYSA-N 0.000 description 1
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- MUTNCGKQJGXKEM-UHFFFAOYSA-N tamibarotene Chemical compound C=1C=C2C(C)(C)CCC(C)(C)C2=CC=1NC(=O)C1=CC=C(C(O)=O)C=C1 MUTNCGKQJGXKEM-UHFFFAOYSA-N 0.000 description 1
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- KEROTHRUZYBWCY-UHFFFAOYSA-N tridecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCCOC(=O)C(C)=C KEROTHRUZYBWCY-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F19/00—Hoisting, lifting, hauling or pushing, not otherwise provided for
- B66F19/005—Lifting devices for manhole covers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
- H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
- H01M50/417—Polyolefins
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/13439—Electrodes characterised by their electrical, optical, physical properties; materials therefor; method of making
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect
- G02F1/153—Constructional details
- G02F1/155—Electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
- H01B1/12—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances organic substances
- H01B1/122—Ionic conductors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/54—Electrolytes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/54—Electrolytes
- H01G11/56—Solid electrolytes, e.g. gels; Additives therein
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/54—Electrolytes
- H01G11/58—Liquid electrolytes
- H01G11/62—Liquid electrolytes characterised by the solute, e.g. salts, anions or cations therein
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0565—Polymeric materials, e.g. gel-type or solid-type
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
- H01M50/491—Porosity
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/054—Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0085—Immobilising or gelification of electrolyte
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49108—Electric battery cell making
- Y10T29/49115—Electric battery cell making including coating or impregnating
Definitions
- the present invention relates to a non-protonic electrolyte thin film, an immobilized liquid membrane conductor, and a polymer battery, and more particularly to a substantially solid electrolyte obtained by selectively swelling and immobilizing a non-protonic electrolyte on a microporous polyolefin membrane.
- Non-protonic electrolyte thin film, immobilized liquid membrane conductor with high electron conductivity in which ionic conductor is immobilized on polyolefin microporous conductive film, and non-protonic electrolyte on electrolyte The present invention relates to a polymer battery using an immobilized liquid film conductor in at least one of a thin film, a positive electrode and a negative electrode. .
- Lithium batteries are non-aqueous or solid electrolyte batteries with high energy densities, and have been put into practical use as low-current semiconductor memory backup power supplies, clocks and cameras.
- the development of ultra-thin lithium secondary batteries that are lightweight, have various shapes, and are flexible are expected. Is done.
- Lithium battery electrolytes must have ion conductivity, but must exhibit little electron conductivity in order to prevent short circuit and accidental discharge due to electron conduction between the positive and negative electrodes. This is a solid electrolyte, which has the advantage that there is no risk of liquid leakage, and that the process is simplified, especially for thin films and large areas.
- Batteries using solid polymer electrolytes may replace the electrolyte of existing batteries.
- paper batteries in the development of ultra-thin batteries called paper batteries, and in the development of electrochemical devices that require a large area, such as electoric mix elements, the ease of assembly and long-term stability are important. Development of solid polymer electrolytes is awaited.
- lithium secondary batteries based on polymer solid electrolytes use lithium metal Development by preventing the formation of dry cells and solving the problem of battery short-circuit damage and ignition, and preventing liquid leakage compared to solution-based secondary batteries. It has been desired.
- the solid electrolyte comprising a conventional polymer, dissolving and L i C 1 0 4 in the polymer are those obtained by dispersing, they L i C 1 ⁇ 4 a lithium salt such as polymethyl Echirenokishi Doyapo polypropylene Po Rieteru, Po Li esters such Okishi de, Po Li Lee Mi de, is a polymer electrolyte dissolved in Po Rieteru derivatives, ionic conductivity 1 0 5 ⁇ 1 0 3 S // cm is sufficiently above room temperature It cannot be used unless the temperature is high.
- the conductor is a porous thin film conductor (porous conductive film) that has high conductivity, and is extremely effective as an electrode or an electrode constituent material in a device using a solid polymer electrolyte or a liquid electrolyte.
- porous conductive film porous conductive film
- the area of the contact interface between the electrode and the electrolyte can be increased. Therefore, for example, a high-performance battery such as a lithium-based primary battery or a lithium-based secondary battery can be manufactured using this. It becomes possible.
- the present invention is a non-protonic electrolyte thin film in which a non-protonic electrolyte solution is impregnated and immobilized on a microporous polyolefin membrane having an affinity for a non-protonic electrolyte solution.
- a polyolefin microporous membrane having an affinity for a non-protonic electrolyte solution can be obtained by graft polymerization of a monomer having solubility in the non-protonic electrolyte solution onto the polyolefin microporous membrane.
- the present invention provides an immobilization solution obtained by impregnating and immobilizing a non-protonic electrolyte solution in a polyolefin microporous film in which an affinity for a non-protonic electrolyte solution is introduced into a polyolefin microporous film containing an electronic conductive material.
- the present invention is a polymer battery comprising a non-protonic electrolyte thin film based on a polyolefin microporous membrane, and positive and negative electrodes. Also, less Both are polymer batteries consisting of an immobilized liquid film conductor based on a microporous polyolefin membrane containing an electronic conductive material as one of its positive and negative electrodes.
- the non-protonic electrolyte thin film of the present invention comprises a microporous polyolefin membrane as a base material, and a nonporous polyolefin membrane containing a substance having an affinity for the non-protonic electrolyte solution. It is obtained by immobilizing a basic electrolyte solution.
- a method for producing a microporous polyolefin membrane containing a substance having an affinity for a non-protonic electrolyte solution a substance having an affinity for a non-porous electrolyte solution is graft-polymerized on a polyolefin microporous membrane.
- Microporous polyolefin membrane a.Polyolefin
- polyolefin examples include polyethylene, polypropylene, ethylene-propylene copolymer, polybutene-11, and poly4-methylpentene-1. Of these, polyethylene is preferred.- As this polyethylene, one made of ultra-high molecular weight polyethylene, high-density polyethylene, or medium-low density polyethylene can be used, but from the viewpoint of strength, safety, film forming properties, etc. Therefore, it is preferable to use ultra-high molecular weight polyethylene or one containing the component thereof.
- the Poriorefui down has a weight average molecular weight of 5 X 1 0 5 or more, preferably rather contains 1 wt% or more of ultra-high molecular weight component of 1 X 1 O fi ⁇ 1 X 1 0 7, molecular weight distribution (Weight average molecular weight, number average molecular weight) is preferably from 10 to 300. "When the content of the ultrahigh molecular weight polyolefin component is less than 1% by weight,
- the polyolefin may be either one obtained by multi-stage polymerization or a composition comprising two or more polyolefins.
- the polyolefin containing the ultrahigh molecular weight component as described above may be added with various additives such as an antioxidant, an ultraviolet absorber, an antiblocking agent, a pigment, a dye, and an inorganic filler, as necessary. It can be added as long as the object of the invention is not impaired.
- microporous polyolefin membrane can be obtained by forming the above-mentioned polyolefin into a membrane.
- the film may be formed by the method described in Japanese Patent Application Laid-Open (JP-A) No. 60-24035 / Japanese Patent Application Laid-Open (JP-A) No. 3-634334. For example, it can be performed as follows.
- a solution is prepared by heating and dissolving the above polyolefin in a solvent.
- a solvent it is possible to use an aliphatic or cyclic hydrocarbon such as nonane, decane, decalin, p-xylene, pendecane, dodecane, liquid paraffin, or a mineral oil fraction having a boiling point corresponding to these. .
- Heat dissolution is carried out with stirring at a temperature at which the polyolefin is completely dissolved in the solvent, or by a method in which the polyolefin is uniformly mixed and dissolved in an extruder.
- the temperature varies depending on the polymer and the solvent to be used. For example, in the case of a polyethylene composition, the temperature is in the range of 140 to 25 CTC.
- it is preferable to dissolve it in an extruder.
- the mixing ratio of the polyolefin and the solvent is 100 to 50% by weight, preferably 10 to 40% by weight, with the total of the polyolefin and the solvent being 100% by weight, and the solvent is 90 to 5% by weight. It is 0% by weight, preferably 90 to 60% by weight. If the polyolefin content is less than 10% by weight (the solvent content is more than 90% by weight), when forming the sheet into a sheep, the die neck at the die outlet is so large that the formability and self-supporting property of the sheet are large. It will be difficult. On the other hand, if the polyolefin content exceeds 50% by weight (the solvent content is less than 50% by weight), the moldability decreases. Next, the heated solution of the polyolefin melt-kneaded in this way is extruded from a die or the like through an extruder and molded.
- a sheet die having a rectangular die shape is usually used, but a double-cylindrical hollow fiber die, an inflation die and the like can also be used.
- the die gap when a sheet die is used is usually 0.1 to 5 mm. mm, and heated to 140-250 ° C during extrusion: The extrusion speed is usually 20-30 cmZ min to 5-1 OmZ min. The solution extruded from the die in this way is quenched. As a result, a gel-like molded product is formed. Cooling is preferably performed at a rate of at least 5 (TCZ).
- the gelled molded product is stretched.
- the stretching is performed by heating the gel-like molded product, and by a usual tenter method, a roll method, an inflation method, a rolling method or a combination of these methods at a predetermined magnification.
- the stretching may be uniaxial stretching or biaxial stretching, but biaxial stretching is preferred. In the case of biaxial stretching, either vertical or horizontal simultaneous stretching or sequential stretching may be used.
- the stretching is performed at a temperature not higher than the melting point of polyolefin plus 1 o ° C, preferably in a range from the crystal dispersion temperature of polyolefin to lower than the crystal melting point.
- a temperature not higher than the melting point of polyolefin plus 1 o ° C preferably in a range from the crystal dispersion temperature of polyolefin to lower than the crystal melting point.
- polyethylene it is in the range of 90 to 140 ° C., and preferably in the range of 100 to L: 30 ° C.-Although the stretching ratio varies depending on the thickness of the raw material, it is preferably 2 or more in uniaxial stretching. More preferably, it is 3 to 30 times.
- the area ratio is preferably 10 times or more, more preferably 15 to 400 times.
- the stretched molded product is washed with a solvent to remove the residual solvent.
- cleaning solvents include hydrocarbons such as pentane, hexane and heptane; chlorinated hydrocarbons such as methylene chloride and carbon tetrachloride; fluorinated hydrocarbons such as trifluoride tan; ethers such as getyl ether and dioxane. Volatile ones such as types can be used.
- washing solvent After extraction, it is desirable to dry the washing solvent and heat-fix it at a temperature in the range of the crystal dispersion temperature to the melting point. .
- the microporous polyolefin membrane has a thickness of 0.1 to: L 00 tim, preferably 0.2 to 50 / im.
- L 00 tim preferably 0.2 to 50 / im.
- the thickness is less than 0.1 ⁇ m, it is difficult to put it to practical use from the viewpoint of mechanical strength and handling.On the other hand, when the thickness exceeds 100 m, the effective resistance increases and the volume efficiency becomes disadvantageous. .
- the porosity of the membrane is not limited, but is in the range of 30 to 95%. If the porosity is less than 30%, the immobilization of the nonprotonic electrolyte solution may be insufficient. On the other hand, if the porosity exceeds 95%, the mechanical strength of the film becomes low, and the practicability is poor.
- the average pore size is preferably 1 or less. If it exceeds l ⁇ m, it becomes difficult to prevent the diffusion of active materials and reaction products.
- the lower limit is not limited, but if the average pore diameter is less than 0.005 / m, there may be a problem in uniformity and polymerization rate in the graft polymerization.
- the microporous polyolefin membrane preferably has a breaking strength of 200 kg / cm 2 or more. By setting the breaking strength to 200 kg / cm 2 or more, deformation resistance against swelling when the nonprotonic electrolyte solution is dissolved in the graft polymer becomes sufficient.
- a method of imparting affinity to a non-protonic electrolyte solution to the surface of a microporous polyolefin membrane and the surface of the pores by a graft polymerization method 1.
- Monomers having an affinity for the non-protonic electrolyte solution include acrylic acid, methacrylic acid, acrylic ester, methyl acrylate, acrylamide, and acrylic acid.
- Ryl nitrile, styrene and its derivatives are used.
- acrylates include methyl acrylate, ethyl acrylate, butyl acrylate, isobutyl acrylate, 2-ethylhexyl acrylate, and laurate.
- a monomer composed of acrylic acid, methacrylic acid, or an ester thereof, or an acrylic monomer composed of acrylamide or a derivative thereof is appropriately selected depending on the solvent of the electrolytic solution used for producing the electrolyte thin film. Specifically, the selection is made in consideration of Hansen parameter, one of the solubility parameters indicating the solubility.
- the Hansen parameter is a three-dimensional parameter obtained by dividing the solubility parameter into three components: the effect of non-polar interaction 5 d , the effect of polarization ⁇ ⁇ , and the effect of hydrogen bonding 5 h . The values have been investigated for many solvents (C. M.
- a distance r between the two on a three-dimensional space coordinate is a square root of ⁇ obtained by the following equation.
- 5 dl , ⁇ ⁇ ,, 5 hl are the Hansen parameters of Polymer 1-5, 5, 5P2 , and 5 h2 are the Hansen parameters of Solvent 2 of the electrolytic solution).
- the Hansen parameter of polymer 1 is empirically determined as described above. If this distance 7 "is less than a certain value, it can be considered a good solvent for this polymer. Therefore, for a particular polymer, Hansen parameters of various solvents are plotted. and, when each is whether the distinction good solvent or a poor solvent, it can be seen that the realm surrounded by a good solvent forms an approximately spherical. in other words, the imaginary sphere (center (5dl, ⁇ ,.
- the blending amount of a single monomer or a plurality of monomers forming a graft polymer is adjusted in accordance with the amount of the solvent used in the electrolytic solution. It becomes swellable and gelled, and it can be firmly fixed.
- the graft polymerized polyolefin membrane is used for the surface of the microporous polyolefin membrane and the pore surface. Electrolyte solvent that is soluble in the covering graft polymer is selectively incorporated, but the swelling is moderate as a whole because the main skeleton is composed of polyolefin with excellent solvent resistance. To prevent large deformation and decrease in strength.
- a radiation-graft polymerization method such as plasma or electron beam or r-ray is used.
- a post-polymerization method in which radicals are generated in the polyolefin microporous membrane and then contacted with a selected monomer, or a simultaneous polymerization method in which a radical is formed in contact with the monomer may be used.
- an inorganic or organic solvent containing 1 to 10% by volume of the selected monomer and, if necessary, 0.01 to 2% by volume of a crosslinking aid (the above-mentioned monomer and crosslinking aid are dissolved or dissolved in this solvent).
- the polyolefin microporous membrane that has been subjected to plasma treatment is immersed in the suspension and subjected to a graft polymerization reaction at 20 to 100 ° C for 1 to 60 minutes while publishing with nitrogen gas, argon gas, or the like.
- a graft polymerization reaction at 20 to 100 ° C for 1 to 60 minutes while publishing with nitrogen gas, argon gas, or the like.
- the solvent water, alcohol such as methanol, or an aqueous alcohol solution can be used.
- the electron beam graft polymerization method As the electron beam graft polymerization method, the polyolefin microporous membrane, the selected monomer and the cross-linking aid are coexistent, and the electron A simultaneous irradiation method of irradiating a microporous polyolefin membrane with an electron beam and then a pre-irradiation method of reacting the selected monomer in the presence of the cross-linking aid. It is preferable to use a pre-irradiation method in order to suppress homopolymerization of the monomer.
- an accelerating voltage of 100 to 5000 is applied to the microporous polyolefin membrane.
- the electron beam is preferably irradiated with KeV, more preferably 200 to 800 KeV.
- the electron beam irradiation can be performed in an air atmosphere.
- the irradiation amount is suitably from 10 to 500 KGy, preferably 50 to 500 KGy.
- the graft of the selected monomer is insufficient, while if it exceeds 500 KGy, the microporous polyolefin membrane may be deteriorated.
- microporous polyolefin membrane irradiated with an electron beam is immersed in the selected monomer solution in the presence of the crosslinking aid to form a graft polymer.
- a graft polymer is selectively formed on the surface of the polyolefin microporous membrane, or a graft polymer is selectively formed on the inner surface of the pore, or is formed on the surface and in the pore.
- a graft polymer can be formed on any of the surfaces.
- the homopolymer by-product in the course of the graft polymerization may be left as it is, but it may be completely washed away using a solvent such as toluene, and only the graft polymer is removed from the polyolefin microporous membrane. May be left on the surface and the inner surface of the pores.
- the amount of graft polymerization depends on the amount of radical generated or monomer concentration, It can be controlled by conditions such as time and temperature.
- the terminal-modified polypropylene is a polypropylene having a functional group structure at the terminal.
- the polypropylene is not limited to propylene homopolymer, but may be one or two of propylene and other ⁇ -olefins (eg, ethylene, 1-butene, 1-hexene, 4-methyl-1-pentene, etc.).
- the above block copolymer rubber is included.
- Polypropylene having a functional group structure at the terminal can be produced as follows.
- the organic aluminum compound is an organic aluminum compound having 1 to 18 carbon atoms, preferably 2 to 6 carbon atoms, or a mixture or complex compound thereof. Examples thereof include dialkyl aluminum monohalide and monoalkyl aluminum dihalide. And alkyl aluminum sesquihalide.
- the polymerization reaction is preferably performed in a solvent that is inert to the polymerization reaction and that is liquid at the time of polymerization.
- a solvent include a saturated aliphatic hydrocarbon, a saturated alicyclic hydrocarbon, and an aromatic hydrocarbon.
- the amount of the polymerization catalyst used in the polymerization of propylene is 1 ⁇ 10 4 to 0.1 mol, preferably 5 ⁇ 1 ° 4 to 5 ⁇ 10 2 mol per 1 mol of propylene, and 1 ⁇ 1 to 4 ⁇ 10 5 mol of the organic aluminum compound. 0 4 to 0.5 mol, preferred properly a 1 X 10- 3 to 0.1 mol.
- the vanadium compound 1 molar equivalent or an organic aluminum compound have to desirable for use 4-1 00 mol s
- the riving polymerization is usually performed at 100 ° C to 10 CTC for 0.5 to 50 hours.
- the molecular weight of the obtained living polypropylene can be adjusted by changing the reaction temperature and the reaction time.
- the polymerization temperature By setting the polymerization temperature at a low temperature, particularly at 130 ° C or lower, a polymer having a molecular weight distribution close to monodispersion can be obtained.
- a ripening polymer having Mw (weight average molecular weight) and ZMn (number average molecular weight) of 1.05 to 1.40 can be obtained.
- a nearly monodisperse living polypropylene having a number average molecular weight of about 400,000 can be produced.
- living polypropylene is reacted with a functional group-containing monomer.
- the monomers to be introduced the same monomers as those used in the graph polymerization method are used.
- the amount of single monomer or multiple monomers that form the living polymer is adjusted according to the solvent of the electrolytic solution. By doing so, the gel is effectively swollen and gelled in the electrolytic solution, and it can be firmly fixed.
- the porous thin film containing the terminal-modified living polymer selectively incorporates an electrolytic solution solvent having an affinity for the living polymerization functional group covering the surface and the pore surface, but the main skeleton is Since it is made of polyethylene having excellent solvent resistance, its swelling is moderately suppressed as a whole, and large deformation and reduction in strength can be prevented.
- the reaction between the living polypropylene and the functional group-containing monomer is carried out by supplying a monomer to a reaction system in which the living polypropylene is present and reacting the monomer.
- the reaction is usually carried out at a temperature of 110 to 150 ° C for 5 minutes to 50 hours.
- By increasing the reaction temperature or lengthening the reaction time it is possible to increase the rate of modification of the polypropylene terminal by the monomer unit. Normally, 1 to 1,000 moles of monomer is used per 1 mole of living polypropylene.
- the methods for producing a microporous polyolefin membrane containing terminal-modified polypropylene include: (1) a method for producing a microporous membrane from a composition obtained by blending the above-mentioned terminal-modified polypropylene with polyolefin; and (2) a method for producing microporous membrane from polyolefin. There is a method of manufacturing a membrane and coating the surface with a terminal-modified polypropylene.
- the method of (1) for producing a microporous membrane from the composition obtained by blending the above-mentioned terminal-modified polypropylene with the polyolefin can be carried out according to the method for producing a microporous polyolefin membrane described above.
- the amount of the terminal-modified riving polymerized polypropylene is 1 to 50% by weight, preferably 3 to 30% by weight of the polyolefin. If it is less than 1% by weight, the effect of impregnation and immobilization of the solvent in the electrolytic solution cannot be expected. On the other hand, if it exceeds 50% by weight, the mechanical strength is significantly reduced.
- a method for producing a microporous membrane from polyolefin and coating the surface with a terminal-modified polypropylene is as follows: the surface of the polyolefin microporous membrane obtained by the method described in 11b above is treated with an aromatic carbon A solution dissolved in a solvent such as hydrogenated hydrocarbons, paraffinic hydrocarbons, black form, tetrahydrofuran, etc., coated by impregnation, coating, or spraying. It is a way to do.
- a solvent such as hydrogenated hydrocarbons, paraffinic hydrocarbons, black form, tetrahydrofuran, etc.
- the waxes having an affinity for non-protonic electrolyte solutions include natural waxes such as vegetable waxes, animal waxes, mineral waxes, petroleum waxes, and synthetic hydrocarbons.
- natural waxes such as vegetable waxes, animal waxes, mineral waxes, petroleum waxes, and synthetic hydrocarbons.
- synthetic waxes such as denatured waxes, hydrogenated waxes, fatty acids, acid amides, esters, and ketones can be used.
- the method for producing a non-protonic electrolyte thin film using the wax of the present invention includes: (1) a method of coating wax on a microporous polyolefin membrane; and (2) a microporous membrane from a polyolefin composition containing wax. There are two methods of manufacturing.
- the wax is diluted with a diluting solvent and coated on the microporous polyolefin membrane obtained by the method described in 11b above.
- a coating method impregnation, coating, spraying, etc. can be used alone or in combination.
- the diluting solvent include hydrocarbons such as pentane, hexane, heptane, and toluene; chlorinated hydrocarbons such as methylene chloride and carbon tetrachloride; fluorinated hydrocarbons such as trifluorinated trichloromethane; Ethers such as mono- and dioxane; and alcohols such as methanol and ethanol.
- composition ratio of a polyolefin composition of an ultra-high molecular weight polyolefin alone or a polyolefin composition to a polyolefin and a resin is 1 to 50% by weight of the total resin composition. %, Preferably 3 to 30% by weight. If the amount is less than 1% by weight, the effect of immobilizing the solvent in the electrolyte solution cannot be expected. On the other hand, if it exceeds 50% by weight, the mechanical strength is significantly reduced.
- the method for producing a microporous polyolefin membrane from a polyolefin composition containing ox can be performed in the same manner as in the method described in 1-b.
- alkali metal salts and alkaline earth metal salts are used, for example, LiF, Nal, LiI, LiC1O4, LiAs Fn, L i PFR, L i BF, L i CFaS O ,, Na S CN And the like.
- the nonprotonic solvent that dissolves the electrolyte of the nonprotonic electrolyte solution is a solvent that is stable to alkali metals.
- a solvent that is stable to alkali metals Specifically, propylene carbonate, ethylene carbonate, and?
- Non-protonic high dielectric constant solvents such as one-butyrolactone, dimethoxetane, acetonitrile, formamide, tetrahydrofuran, and getylether are used alone or in combination of two or more. Used in combination.
- the content of the electrolyte solution is 70 to 35% by weight, preferably 80 to 250% by weight of the microporous polyolefin membrane.
- the retention rate is less than 70% by weight, the interface with the electrolyte solution is reduced, and the application as a battery, a capacitor, and an electrochromic element at the mouth is restricted from a practical point of view.
- it exceeds 350% by weight the mechanical strength of the film becomes insufficient.
- impregnation, coating, spraying, or the like can be used alone or in combination.
- the electrolyte solution may be fixed before being incorporated into the battery, during the battery assembly process, or at the final battery assembly process.
- the conventional battery assembly process can be applied as it is, it can be used during the battery assembly process or the final battery assembly process.
- the method of immobilizing the electrolyte solution is preferred.
- the impregnation is performed by capillary action.
- the electrolyte solution becomes solidified by dissolving and swelling the graft polymer.
- the immobilized electrolyte works almost the same as the liquid in ionic conductivity, so that the problem of the operating temperature can be avoided.
- the immobilized liquid membrane conductor of the present invention comprises fixing a non-porous electrolyte solution to a microporous polyolefin membrane containing an electron conductive material and a substance having an affinity for the non-proton electrolyte solution.
- These methods can be performed according to the above-mentioned method for producing a non-protonic electrolyte thin film by blending an electronic conductive material described below with polyolefin.
- Electronic conductive materials include various metals and semiconductors, oxides and sulfides. And the like. These may be in the form of particles, fibrils, fibrils, whiskers, or the like. Particularly preferred are, T i S 3, T i S 2, T i O 2, V 2 Or ', Nb S e 3, Mn0 2, L i C o 0 2, L i N i 0 2, L i M n 2 0 4, P b 0 2, n i battery positive electrode active material such as OOH, petroleum co one box, natural graph eye DOO, force one Bonfu Aiba one, P b, battery negative electrode active material and acetylene bra such C d
- conductive agents such as rubber, metal black (trademark of AkzoChemic, Inc.), Bonuis, Graphite Wis, and Graphite.
- the compounding amount of the electronic conductive material is preferably 1 to 200% by weight, particularly 5 to 100% by weight of the polyolefin used. If the amount is less than 1% by weight, it is difficult to obtain sufficient conductivity, and if it exceeds 200% by weight, it becomes difficult to obtain a film having practically sufficient strength.
- Immobilized liquid Makushirube collector of the present invention composed of the above, 1 0 5 SZ cm or more, preferably has a specific conductivity of more than 10 3 SZ cm. Specific conductivity of less than 10 5 SZ cm impractical effective resistance is increased: For example, the effective resistance when the film thickness 1 ⁇ M 1 mZ 10 5 S / cm, that is, 1 0 ⁇ cm 2.
- the non-protonic electrolyte thin film which is a gel electrolyte obtained above
- a conventional cathode and anode a polymer battery can be obtained:
- the non-protonic electrolyte thin film obtained above is used as a positive electrode-fixed liquid film conductor containing a positive electrode active material of an electronic conductive material and a small amount of a negative electrode solidified liquid film conductor containing a negative electrode active material as an electronic conductive material.
- a polymer battery that is safer and more economical than conventional batteries using liquid electrolytes can be obtained.
- this conductive thin film or immobilized liquid film conductor was applied, a lightweight and highly flexible composite electrode was used, and the electrolyte solvent was immobilized by the solubility of the filled polymer, and the polyolefin was used.
- the electrolyte solvent can be stably held in a wide temperature range, and the evaporation rate of the electrolyte solvent can be kept extremely low. Good conductivity can be maintained over a wide temperature range. That is, it is possible to manufacture a polymer battery capable of improving safety in overcharging without significantly reducing electronic conductivity.
- the organic electrolyte can be contained in the pores of the lithium ion conductive polymer membrane, so that lithium ion can pass not only in the electrolyte but also in the polymer electrolyte. Discharge at a high rate is also possible. Furthermore, the electrolyte in the pores of the porous polymer electrolyte secures a passage through which the ions diffuse quickly, so that a higher rate of discharge can be achieved than in a conventional polymer electrolyte lithium battery.
- the oxidation and reduction of the organic electrolyte by the positive and negative electrodes which are problematic for high-voltage batteries, are reduced by covering part or all of the interface between the electrolyte and the electrolyte with a porous lithium ion conductive polymer. The charge and discharge characteristics can be improved. Also in this case, since the lithium ion conductive polymer is porous, it is possible to discharge at a high rate.
- Po triethylene microporous film (weight-average molecular weight 1. IX 1 0 6, molecular weight distribution 2 0, thickness 25 // ⁇ , average Anakai 0. 03 m, porosity 43.5%, tensile strength of 1 049 kg / cm 2 ) under a argon atmosphere at 0.1 mbar, 10 W, for 60 seconds, irradiating the plasma with methyl acrylate aqueous solution (at a monomer concentration of 4 vol% and using water as a solvent) at 30 °
- the graft polymerization was carried out by contacting with C for 0.1, 15 and 1000 minutes, respectively.
- Example 2 After the reaction, the product was washed with toluene and dried in a 50 ° C oven to obtain a microporous PE membrane (samples a, b, and c). in graph topo Li Ma one amount, respectively 0. 02, 2. 3, 34m cm 2 there were. The tensile strength at break 985, 995, 1 90 k gZ cm 2 der ivy.
- Example 2
- Example 1 a butyl acetate emulsion solution (water having a monomer concentration of 10 vol% and sodium dodecylbenzenesulfonate added as a solvent) was used and contacted at 30 ° C for 60 minutes. In the same manner as in Example 1 except that the polymer was subjected to graft polymerization, the amount of the graft polymer was 1.5 mg / cm 2 , and the tensile breaking strength was 940 kg / cm 2. d) was obtained.
- Example 3 a butyl acetate emulsion solution (water having a monomer concentration of 10 vol% and sodium dodecylbenzenesulfonate added as a solvent) was used and contacted at 30 ° C for 60 minutes. In the same manner as in Example 1 except that the polymer was subjected to graft polymerization, the amount of the graft polymer was 1.5 mg / cm 2 , and the tensile breaking strength was 940 kg / cm 2. d) was
- Example 2 In Example 1, 30 ml of 2-ethylhexylacrylamide solution (water containing a monomer concentration of ⁇ ⁇ ⁇ 1% and sodium dodecylbenzenesulfonate added as a solvent) was used. A graft polymerization was performed in the same manner as in Example 1 except that the graft polymerization was performed by contacting at 30 ° C. for 30 minutes and the graft polymer amount was 2.6 mgZ cm 2 and the tensile breaking strength was 1035 kg / cm 2 . PE microporous membrane (sample e) was obtained: Example 4
- microporous PE membranes (samples, d, e) subjected to the graft polymerization obtained in Examples 1 to 3 were each obtained by subjecting three types of 10 ⁇ 10 cm squares to r-butyrolactone at 25 ° C., Soaked in Tetrahydrofuran and Jetir ⁇ tel for 1 hour.
- the time-dependent change of the film weight was measured, and the weight increase rate obtained by extrapolation after 0 seconds was as shown in Table 1.
- the weight loss rate after 1 hour was as shown in Tables 1 and 2. Comparative Example 1
- Example 5 As a comparison, a 10 ⁇ 10 cm square of a PE microporous membrane (same as in Example 1) was immersed in r-butyrolactone, tetrahydrofuran, and getilerutel at 25 ° C. for 1 hour.
- the weight increase rate was as shown in Table 1.
- the time-dependent change of the weight starting from the weight extrapolated after 0 seconds in the state of being left in the air at 25 ° C was measured, and the weight loss rate after 1 hour was as shown in Table 2.
- Example 5 The time-dependent change of the weight starting from the weight extrapolated after 0 seconds in the state of being left in the air at 25 ° C was measured, and the weight loss rate after 1 hour was as shown in Table 2.
- Example 1 The microporous PE membrane subjected to the graft polymerization obtained in Example 1 (sa, b, and c) was prepared by mixing three types of 10 ⁇ 10 cm squares with 1 mol% of LiBF 4 at 25 ° C. R was immersed in petrolactone for 1 hour to obtain a non-protonic electrolyte thin film:
- This sheet was simultaneously biaxially stretched 5 ⁇ 5 times at 115 ° C using a batch-type biaxial stretching machine, and the remaining fluid halfin was washed with ⁇ -hexane and fixed to a metal frame. In this state, the resultant was dried at 120 and heat-set to obtain a polyethylene microporous thin film.
- this non-protonic electrolyte thin film was punched into a diameter of 1 Omm, sandwiched between platinum black electrodes, and the electrical resistance of the thin film was measured with an alternating current of 1 KHz, and the thickness and thickness of the thin film were measured.
- the ionic conductivity of the thin film was calculated from the area, it was 7 ⁇ 10 3 SZ cm.
- Example 7 Weight average molecular weight of 2.5 x 1 0 ultra high molecular weight polyethylene 6% B, high density polyethylene 24 wt% of the weight average molecular weight of 3.5 1 0 5, liquidity paraffin (64 c S t Z40 ° C ) 70 Weight % Of the mixture, 0.375 parts by weight of an antioxidant per 100 parts by weight of the polyolefin composition was added, and the mixture was heated and kneaded with a twin-screw extruder.
- the amount of propylene introduced was 14% by weight.
- the obtained polyethylene porous thin film 10 ⁇ 10 0.1 cc of r-butyrolactone solution containing 1% of Mo of 25 C of LiBF in a square mm is dropped and left in a sealed container for 1 hour to remove nonprotonic electrolyte thin film. did.
- the time-dependent change in the membrane weight was measured and extrapolated after 0 seconds to obtain a weight increase rate of 56%. Starting from the weight extrapolated after 0 seconds in the state of standing in the air at C As a result of measuring the change over time of the weight, the rate of weight loss after 1 hour was 0.5% or less.
- this non-protonic electrolyte thin film was punched out to a diameter of 1 Omm, sandwiched between platinum black electrodes, and the electrical resistance of the thin film was measured with an alternating current at a frequency of 1 KHz.
- the ionic conductivity of the product was calculated to be 7 ⁇ 10 3 SZ cm. Comparative Example 3
- the obtained non-protonic electrolyte thin film was punched to a diameter of 1 Omm, sandwiched between platinum black electrodes, and the electrical resistance was measured with an alternating current at a frequency of 1 KHz.Calculation was made from this value and the thickness and area of the thin film.
- the ionic conductivity was 5 ⁇ 10 3 S / cm.
- Polyethylene microporous porous membrane 1 0 X 10 mm square was immersed for 1 hour in propylene carbonate
- a nonproton electrolyte thin film of 125% was obtained.
- the obtained non-proton electrolyte thin film was punched to a diameter of 10 mm, sandwiched between black and white electrodes, and measured for electrical resistance with an alternating current at a frequency of 1 kHz.
- the ion conductivity calculated from this value and the thickness and area of the thin film The rate was 1 ⁇ 10 2 S / cm.
- the polyethylene was down microporous film 1 0 X 1 Om m square containing the Esuteruwa' box to flop c pyrene carbonate Natick preparative solution containing L i PF 6 in 1 mole of 25 ° C
- Example 8 the l O xl Omm angle before the Poryechiren microporous membrane for performing co one coating with stearic Nokutadeshiru, crushed immersed for 1 hour in propylene carbonate Natick preparative solution containing 1 mole of L i PF fi of 25 ° C A nonprotonic electrolyte thin film having a swelling ratio (weight increase ratio) of 72.5% was obtained.
- the obtained non-proton electrolyte thin film was punched out to a diameter of 1 Omm, sandwiched between platinum black electrodes, and the electrical resistance was measured with an alternating current at a frequency of 1 kHz, and this value was compared with the non-proton electrolyte thin film.
- ionic conductivity was calculated from the thickness and area was 3 X 1 0 3 S / cm :: Example 1 1
- This sheet was simultaneously biaxially stretched 5 ⁇ 5 times at 120 ° C. using a batch type biaxial stretching machine, and the remaining liquid paraffin was washed with n-hexane and then fixed on a metal frame. Dry at 120 ° C, heat set and electronically conductive Charge and to obtain a microporous polyethylene film containing a terminal denatured polypropylene.
- the obtained immobilized liquid film conductor was punched out to a diameter of 1 Omm, sandwiched between platinum black electrodes, and the electric resistance was measured with an alternating current at a frequency of 1 kHz, and this value and the thickness of the immobilized liquid film conductor were measured. And the specific conductivity calculated from the area was 8 ⁇ 10 2 S / cm.
- Example 1 2 5 parts by weight of ultra-high molecular weight polyethylene (weight average molecular weight 2 ⁇ 10 6 ), 25 parts by weight of high-density polyethylene (weight average molecular weight 4 ⁇ 10 5 ), 30 parts by weight of petroleum coex powder, and polyethylene plaque 0.37 parts by weight of an antioxidant was added to 100 parts by weight of a mixture containing 3 parts by weight of a powder (Akzo Chemical Co., Ltd.) and 70 parts by weight of liquid paraffin, and the mixture was heated and kneaded with a twin-screw extruder. The sheet was extruded from a die having a rectangular base and taken up by a chill roll to form a 1 mm thick sheet.
- a powder Alkzo Chemical Co., Ltd.
- the sheet was simultaneously biaxially stretched 55-fold at 120 ° C using a batch-type biaxial stretching machine, and the remaining liquid paraffin was washed with n-hexane and fixed to a metal frame. After drying at ° C and heat setting, a polyethylene film containing an electronic conductive material was obtained.
- the resulting film (thickness 30 / xm) was diluted to 15% by weight with methylene chloride.
- Living polymerized polypropylene having a methyl acrylate group at one end of each molecular chain (weight average molecular weight 5 ⁇ 10 4 ) was applied, left to stand at room temperature for 24 hours, and dried to obtain a microporous polyolefin thin film having a living polymerization polypropylene content of 46% by weight.
- Example 1 2 the port Riechiren microporous film before being coated by living polymerization of polypropylene, propylene force Bone preparative solution crushed immersion 1 h with 1 mole of L i PF 6 of 25 ° C, the swelling ratio (weight gain 81.5% of the immobilized liquid film conductor was obtained.
- the obtained immobilized liquid film conductor was punched out to a diameter of 10 mm, sandwiched between platinum black electrodes, and the electric resistance was measured with an alternating current at a frequency of 1 kHz, and this value and the immobilized liquid film conductor were measured.
- the specific conductivity calculated from the thickness and the area was 4 ⁇ 10 2 S / cm.
- Microporous polyethylene film (weight-average molecular weight 1. 1 X 1 0 6, molecular weight distribution 2 0, thickness 25 m, porosity 40%, tensile strength 1 049 kg / cm 2) in the main Chiruaku Li rate plasma graph Polymerization was carried out by a polymerization method. Irradiate with 0. lmbar, 10W, 60 seconds plasma in an argon atmosphere, and apply to aqueous methyl acrylate solution (monomer concentration is 4Vo 1%, water is used as solvent) at 30 ° C, 1 The graft polymerization was performed by contacting for 5 minutes. After the completion of the reaction, the resultant was washed with toluene and dried in a 50 ° C oven.
- the amount of the graph top polymerized per unit substrate area was 3.9 mgZcm 2 .
- the obtained microporous PE membrane 1 O xl Omm angle subjected to graph preparative polymerization was immersed for 1 hour in propylene force one Bonnet one that contains the L i PF 6 of 1 M of 25 ° C, the swelling ratio (percent weight increase 1) 34% non-protonic electrolysis Thin film.
- Po triethylene weight average molecular weight 4. 0 X 1 0 Po Riechiren 10 parts by weight of 5 and a weight-average molecular weight 2. 0 X 10 po Riechiren 2 parts by weight of 6) 1 2 parts by weight of petroleum coke powder 1 5 parts by weight Ketch: 0.37 parts by weight of an antioxidant was added to 10 parts by weight of a mixture containing 3 parts by weight of ⁇ black powder and 70 parts by weight of liquid paraffin, and the mixture was heated and kneaded with a twin-screw extruder. This was discharged from a die having a rectangular base and taken up by a chill roll to form a 1 mm thick sheet.
- This sheet was simultaneously biaxially stretched 55-fold at 120 ° C using a batch-type biaxial stretching machine, and the remaining liquid paraffin was washed with n-hexane and fixed to a metal frame. After drying at 120 ° C. and heat setting, a polyethylene film containing an electronic conductive material was obtained.
- the obtained polyethylene film (thickness: 30 / zm) containing the electroconductive material was irradiated with plasma at 0.1 mbbar, 1 OW for 60 seconds in an argon atmosphere, and a methyl acrylate aqueous solution (monomer concentration was measured). (4 Vo 1%, water was used as a solvent) at 30 ° C for 15 minutes to perform graft polymerization.
- the resultant was washed with toluene and dried in a 50 ° C oven to obtain a polyethylene film containing an electroconductive material subjected to graft polymerization. From the weight change before and after the polymerization, the amount of the grafted polymer per unit area was 2.5 mg / cm 2 .
- Microporous polyethylene film containing the resulting electrically-conductive material which has been subjected to grayed rafts polymerization was immersed for 1 hour in propylene force one Bonnet one preparative solution containing L i PF 6 of 1 M of 25 ° C, swelling Rate (weight increase rate) A negative electrode-immobilized liquid film conductor of 126% was obtained.
- This sheet was simultaneously biaxially stretched 5 ⁇ 5 times at a temperature of 120 ° C. using a batch type biaxial stretching machine, and the remaining liquid paraffin was washed with n-hexane and fixed to a metal frame. Drying was performed at 120 ° C in the cold state, and heat setting was performed to obtain a polyethylene film containing an electronic conductive material.
- the resulting polyethylene film (thickness 30 ⁇ m) containing the electronic conductive material was irradiated with 0.1 ⁇ m bar, 10 W, 60 seconds plasma under an argon atmosphere for 60 minutes to obtain a methyl acrylate aqueous solution (monomer concentration).
- the non-protonic electrolyte thin film of the present invention uses a graphene-polymerized polyolefin microporous film as a base material, and has good dissolution and retention properties in the solvent of the electrolyte used.
- the non-protonic electrolyte thin film has excellent mechanical strength and durability. Since the graft polymer blocks at least a part of cells of the polyolefin porous thin film and blocks substantially all of the cells, it selectively contains and immobilizes an electrolyte solvent having an affinity for the graft polymer. be able to.
- the electrolyte solution is immobilized by the functional group of the terminal chain, and the polyolefin microporous film is immobilized.
- the electrolyte solution can be stably held in a wide temperature range, and the evaporation rate of the electrolyte solution solvent can be kept extremely low.
- the ionic conductivity can be easily controlled according to the purpose of use.
- the immobilized liquid membrane conductor of the present invention immobilizes the electrolyte solution by the solubility of the polymer introduced into the conductive microporous polyolefin membrane, and suppresses excessive swelling by the base skeleton of the microporous polyolefin membrane.
- the electrolyte solution can be stably held in a wide temperature range, and the evaporation rate of the electrolyte solution can be kept extremely low, so that good conductivity can be maintained over a wide temperature range. That is, the safety in overcharging can be improved without significantly lowering the electronic conductivity.
- the immobilized liquid film conductor has excellent mechanical strength due to the skeleton made of polyolefin, and can be applied with almost no change in the conventional battery manufacturing process.
- Membrane conductors have both ion and electron conductivity, so electrode materials for batteries using liquid electrolyte, chromic elements at the electrification port, electrodes for electric double layer capacitors, liquid crystal elements, etc. It is useful for prevention materials, electromagnetic shielding materials, conductive paints, adhesives, Ic packaging materials, sheet heating elements, surface switch primary batteries, and secondary batteries.
- lithium ions can pass not only in the electrolyte but also in the polymer electrolyte, and can discharge at a higher rate than the conventional liquid electrolyte lithium battery.
- the electrolyte solution in the pores of the porous polymer electrolyte secures a path through which ions diffuse rapidly, and therefore, the battery according to the present invention has a higher conductivity than the conventional polymer electrolyte lithium battery.
- a polymer battery with good high-rate discharge performance at low temperatures, low self-discharge even at high temperatures, and excellent long-term charge storage characteristics can be obtained.
- by covering a part or the whole of the interface between the positive electrode and the negative electrode and the electrolyte with a porous lithium ion conductive polymer by covering a part or the whole of the interface between the positive electrode and the negative electrode and the electrolyte with a porous lithium ion conductive polymer, oxidation of the organic electrolyte by the positive electrode and the negative electrode, which is a problem for a high-voltage battery, can be achieved. Reduction can be reduced, and charge / discharge characteristics can be improved.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Nonlinear Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Optics & Photonics (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Mathematical Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Cell Separators (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Secondary Cells (AREA)
- Primary Cells (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/117,994 US6235432B1 (en) | 1996-12-11 | 1997-12-11 | Thin non-protonic electrolytic film, immobilized liquid-film conductor, and polymer cell |
EP97947896A EP0883137B1 (en) | 1996-12-11 | 1997-12-11 | Thin aprotic electrolyte film, immobilized liquid film conductor, and polymer cell |
CA002242993A CA2242993C (en) | 1996-12-11 | 1997-12-11 | Thin film of non-protonic electrolyte, electrolyte-immobilized liquid-film conductor and polymer battery |
DE69735551T DE69735551T2 (de) | 1996-12-11 | 1997-12-11 | Dünner, aprotischer Elektrolytfilm, immobilisierter Flüssigfilmleiter und Polymerzelle |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8/351903 | 1996-12-11 | ||
JP35190396A JP4486168B2 (ja) | 1996-12-11 | 1996-12-11 | 非プロトン性電解質薄膜、その製造方法およびそれを用いた二次電池 |
JP01330097A JP3927638B2 (ja) | 1997-01-09 | 1997-01-09 | 非プロトン性電解質薄膜およびその製造方法 |
JP9/13300 | 1997-01-09 | ||
JP9/96436 | 1997-03-31 | ||
JP09643697A JP3927645B2 (ja) | 1997-03-31 | 1997-03-31 | 固定化液膜導電体 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998026429A1 true WO1998026429A1 (en) | 1998-06-18 |
Family
ID=27280197
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1997/004561 WO1998026429A1 (en) | 1996-12-11 | 1997-12-11 | Thin aprotic electrolyte film, immobilized liquid film conductor, and polymer cell |
Country Status (6)
Country | Link |
---|---|
US (1) | US6235432B1 (ja) |
EP (1) | EP0883137B1 (ja) |
KR (1) | KR100498563B1 (ja) |
CA (1) | CA2242993C (ja) |
DE (1) | DE69735551T2 (ja) |
WO (1) | WO1998026429A1 (ja) |
Cited By (1)
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EP1157067A1 (en) * | 1998-12-08 | 2001-11-28 | LG Chemical Co. Ltd | Separator for secondary battery and porous film made of polyolefin blend and process for preparing the same |
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- 1997-12-11 KR KR10-1998-0706184A patent/KR100498563B1/ko not_active IP Right Cessation
- 1997-12-11 EP EP97947896A patent/EP0883137B1/en not_active Expired - Lifetime
- 1997-12-11 DE DE69735551T patent/DE69735551T2/de not_active Expired - Lifetime
- 1997-12-11 CA CA002242993A patent/CA2242993C/en not_active Expired - Fee Related
- 1997-12-11 WO PCT/JP1997/004561 patent/WO1998026429A1/ja active IP Right Grant
- 1997-12-11 US US09/117,994 patent/US6235432B1/en not_active Expired - Lifetime
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1157067A1 (en) * | 1998-12-08 | 2001-11-28 | LG Chemical Co. Ltd | Separator for secondary battery and porous film made of polyolefin blend and process for preparing the same |
EP1157067A4 (en) * | 1998-12-08 | 2002-11-04 | Lg Chemical Ltd | INSULATOR FOR SECONDARY ACCUMULATORS AND POROUS FILM CONSISTING OF A POLYOLEFIN MIXTURE AND METHOD OF MANUFACTURE THEREOF |
Also Published As
Publication number | Publication date |
---|---|
DE69735551T2 (de) | 2006-12-21 |
CA2242993C (en) | 2008-09-09 |
US6235432B1 (en) | 2001-05-22 |
KR19990082451A (ko) | 1999-11-25 |
KR100498563B1 (ko) | 2005-10-06 |
DE69735551D1 (de) | 2006-05-11 |
CA2242993A1 (en) | 1998-06-18 |
EP0883137A4 (en) | 2001-09-12 |
EP0883137B1 (en) | 2006-03-22 |
EP0883137A1 (en) | 1998-12-09 |
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